Mangoworms are small maggots that burrow into the skin of animals. They can grow to be as big around as the size of a standard straw from mcdonalds. And yes, they burrow everywhere. Standard removal is to grasp infected area, and squeeze until the mangoworm is popped out, in a fashion similar to a zit.
And what I planned on posting was a video of removal of over twenty in one hole in the side of a corgi.
But the rules say no gross stuff. Neeghg.